The orb had formed a pair of hands - at least they felt like hands - that were supporting her breasts. As though to welcome her back to consciousness she felt them clamp down on her nipples, pinching them roughly and making her moan.
She was very turned on, and the scary thing was that the orb knew just how much. At the unexpected pinch on her breasts she was all of a sudden struggling, fighting, sure that she had had enough and yet that was just on the surface. There was some strange synergy between this technology and her subconscious. Her body was betraying her, calling out "I want more!". It was the return of the tentacle between her legs, its head warm and slippery as it ran up and down her nether lips that was the orb's reply "I know."
For the first time Karen felt the orb enter her. The magic material that could seemingly form any shape and move in any way had chosen to enter her like a real cock. It was warm and hard and she felt her muscles clench around it in welcome. Unable to move all she could do was gasp and wrap her dazed mind around the sensations of it moving deep inside of her.
This wasn't a man's cock though, she knew that at once. There were ripples moving up and down its length seemingly at random, and it was curving, probing her internal walls. When it found her g-spot it gave a low vibration in greeting.
The hands on her breasts began to massage her, gently. The combination of gentle stimulation with the absoluteness of her bondage made Karen tingle all over.
Then, slowly, the cock began to thrust. She had never felt friction quite like it, she was so swollen, so wet, and yet she could feel every millimetre it moved. It would pull out and all she could do was beg with her mind for it to thrust back into her, deeper, harder, faster. And the orb obliged, gradually, building her up. Every time it entered her she would feel it curve and push against her spot. The climax was unavoidable and came at her like an avalanche.
She felt herself clenching uncontrollably on the intruder and it responded by burying itself deep inside her, rubbing and vibrating against her g-spot. She closed her eyes and moaned at the pleasure, then opened them wide as what felt like a warm, wet tongue joined in rubbing on her clitoris. The outside world lost focus and everything went snowy as the orgasm seemed to stretch to infinity.
When she came back to the room Karen realised that the artificial cock was still inside her. She gave another gasp as she felt it ripple and vibrate gently inside her, clenching at it involuntarily. The orb had graciously allowed her to peak and drift back but now it was reasserting itself yet again. She was tired but she couldn't deny that she wanted more.
The vibration came again, gently, and then again. By now she was so sensitive that even this minimal stimulation caused her to squirm, her internal muscles contracting themselves deliciously. Something strange was happening, and it wasn't until the next wave that Karen realised what was happening. Her muscles were squeezing this intruder every few seconds and the orb was getting in tune with her rhythm, anticipating and stimulating her as she closed around it. Increasing her arousal exponentially every time.
With the last of her conscious will Karen tried to prevent the next twitch of her muscles, to break the cycle. It was no good; the orb and her body were once again conspiring against her. She squeezed, the orb hummed and pulsed, and a moan escaped her hips. Every time she became more aroused.
Then she was coming again, gently at first but as the waves of vibration broke against her it escalated quickly, taking her higher and higher and higher. The hands were massaging and tongue on her clit was back. It was too much, it was so intense, far too much! She was screaming again and with the very last of her strength she fought against her bonds. Her muscles were still squeezing, squeezing around the expert liquid that vibrated and rippled and pressed and tingled against the very centre of her body's pleasure.
As she started to black out the last thing Karen was aware of was the restraining bands releasing her, retracting back into the belt around her waist.
She flopped down onto the bed and fell into the soft oblivion of sleep.